How to update a 1d array multiple scatter graph/plot

[Grant_C]

 Hi, i am trying to append data to the single plot graph you see below.  It is a 1d array.  When i build another array to append to this, it becomes a 2d array and am not quite sure how to manipulate this data into another graph/chart.  I have a set x-scale from -10 to -100 and on each iteration, about 100 y values are inserted to say -10 and then -20 (x scale) and so on until -100.  The graph will be of scatter type.

Any suggestions? 

 

[muks]

You can do "build array" and right click and choose concatanate inputs if you want a continous value graph. Or are you having trouble diaplaying a 2 d array as such?

[Grant_C]

Hi muks, i am using LabVIEW 8.5.  Have read about setting this and when i checked this - it is enabled and greyed out.  I can build the array but when it becomes a 2D then the graphs & charts just dont want to know.

[muks]

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graphs & charts just dont want to know

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Sorry but I am not getting this. Can you post a screen shot of your output?

[GerdW]

Hi Grant,

the main problem is you don't show us all of your code!

The shift register already contains a 2D array, that's why concatenation mode is enabled for the build array... Change the data in the shift register to 1D array!

[Grant_C]

Hi, the previously posted jpg is pretty much my current output. The (Array of Pts) Single Plot is a 1D array.  This works fine for one iteration.  ie For 1 x-scale value, i plot 100 y values on say x=-10.

My problem is that i want to loop this in my while loop and add more x values but retain previous results on the graph.  Now i thought that by using a build array would work but because it creates a 2D array, i dont know what is the best method of putting the new data into a graph.  Dont think build array is correct.

Thanks

[Grant_C]

Hi, here is the vi.

[GerdW · Accepted solution]

Hi Grant,

as said before: the build array is forced to create a 2D array by your shift register. Change the default constant to an 1D array!

[Grant_C]

Hi, i have changed the shift register to 1D and all is well.  Why does it automatically create a 2D.  Something so simple causing so much problem.

[GerdW]

Hi Grant,

it depends on the order of wiring. When you first set the shift register then all is fine